Each building requires a unique identifying code of up to ten letters and numbers. We recommend using existing codes where possible. Where facility codes do not already exist, you will have to choose new ones. Keep in mind that several reports are sorted by facility code. For example, if you have over 100 buildings, the third building could be identified as facility 003. It should not be identified as 3 because all facility codes starting with 0, 1, or 2 (such as 150, 225, etc) would appear ahead of it in a sorted list.
You may choose to use letter prefixes to ensure that building types of departments are kept together in large reports. In this case you could use A012 to identify the 12th building in department A.